ext/ipp/sources/ippcp/pcpmont_getsize.c

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/* 
//               Intel(R) Integrated Performance Primitives
//                   Cryptographic Primitives (ippcp)
// 
//  Contents:
//        cpMontGetSize()
//
*/

#include "owndefs.h"
#include "owncp.h"
#include "pcpbn.h"
#include "pcpmontgomery.h"

#include "pcptool.h"

/*F*
// Name: cpMontGetSize
//
// Purpose: Specifies size of buffer in bytes.
//
// Returns:                Reason:
//      ippStsNoErr         no errors
//
// Parameters:
//      poolLength   length of pool
//      maxLen32     max modulus length (in Ipp32u chunks)
//      pCtxSize     pointer to size of context
//
*F*/

IppStatus cpMontGetSize(cpSize maxLen32, int poolLength, cpSize* pCtxSize)
{
   {
      int size = 0;
      int maxBitSize = maxLen32 << 5;
      gsModEngineGetSize(maxBitSize, poolLength, &size);

      *pCtxSize = sizeof(IppsMontState)
               + (cpSize)size
               + MONT_ALIGNMENT-1;

      return ippStsNoErr;
   }
}